[Fools rush in where wise men fear to go]
I've not had to deal with it myself and I'm certainly no expert, but I've worked enough with experts in the recovery community to be fairly confident of two things. First, alcoholism is a disease, no more a sign of weakness or moral failing than is cancer. Second, fixing it (stopping) will be very, very hard, likely harder than you realize now.
Because it's not caused by personal weakness, strength and willpower -- while helpful -- are likely not enough to fix it, any more than they would be enough to cure cancer. (By comparison, you can smoke one or two cigarettes a month without reverting to smoking two packs a day; doesn't work that way with alcoholism.) Committing yourself publicly may not help much either. Support from friends and family? Also helpful; also not enough.
However you approach it, it's likely to be a long, hard slog. And you may experience failure many times before you succeed. But keep at it, and good luck.
Again, I'm certainly not criticizing. It took me several tries to quit smoking (what worked for me is likely not transferrable to others), there are still a couple of other self-destructive behaviors I need to address, and none of mine are anywhere near as tough to beat as alcoholism. So you're way ahead of me.